Aims. A significant fraction of early-type galaxies (ETGs) exhibit emission lines in their
optical spectra. We attempt to identify the producing the emission mechanism and the …

We present optical integral field spectroscopy for a flux-limited sample of 19 quasi-stellar
objects (QSOs) at low redshift (z< 0.2) and spatially resolve their ionized gas properties at a …

We present a set of new analytic solutions aimed at self-consistently describing the spatially
averaged time evolution of the gas, stellar, metal, and dust content in an individual star …

To date, the question of which progenitor channel can reproduce the observed rate of Type
Ia supernovae (SNe Ia) remains unresolved, with the single and double degenerate …

Accreting white dwarfs (WDs) with non-degenerate companions are expected to emit in soft
X-rays and the UV, if accreted H-rich material burns stably. They are an important …

While we observe a large amount of cold interstellar gas and dust in a subset of the early-
type galaxy (ETG) population, the source of this material remains unclear. The two main …

Context. The hot gas that fills the space between galaxies in clusters is rich in metals. In their
large potential wells, galaxy clusters accumulate metals over the whole cluster history and …

Once thought to be devoid of warm and cold interstellar matter, elliptical galaxies are now
commonly observed to host extended regions of neutral and ionized gas. Outside of the …

For the first time, we establish a gas-phase abundance pattern calibration for quiescent
galaxies using optical emission lines. Quiescent galaxies have warm ionized gas showing …

Important clues to the chemical and dynamical history of elliptical galaxies are encoded in
the abundances of heavy elements in the X-ray emitting plasma. We derive the hot …